Other than a "page-break-before: always" CSS setting and a link offered to the reader allowing them to voluntarily "jump" past the notes to the beginning of the next section, I don't think there's a way to achieve exactly what you're looking for.

You could put the notes in their own files between chapters/sections and use the "linear=no" attribute in the spine of the OPF for those files ... but there's no guarantee that the reading system will honor the attribute.